Sewing-machine.



J. H. MASTEHSON.

l sewms MACHINE.

` APPLICATIGN FILED MAY 2l. l9l7. 1932,68@ Patented May 6, 1919.

2 SHEETS-SHEET 2.

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(fa/waa@ HMG/62521307@ JAMES H. MASTERSON, OFCOLLEGE :POI-NT,'2l.\l'll`l7ly YORK, SSIGNOR T0 FREDERICK OSANN COMPANY, A. CORPORATION OF NEW YORK.,

SEWING-MOHJENE.

manana.

To all whom t may concern Beit known that ll, JAMES H. Mnsrnnson, a citizen of the United States, and a resident of College Point, Queens county, Long Island, State of New York, have ,invented certain new and useful fmprovements in Sewing-Machines, of which the following is a specification, reference being had to the accompanying drawings, forming part thereof.

This invention has 'reference to. improvements in sewing machines and more particularly to improvements in button sewing machines.

Une object of the invention is to improve the construction of the work holder whereby the same may be more readily and accu-4 rately adjusted to receive the button -and the fabric to which the button is to be sewn.

Another object of the invention is to facilitate the operation, of severing the thread after the sewing operation and the release of the work.

@ther objects of the invention will ap- .pear from the following description.

' The invention consists in the novel construction of the button holder having the j adjustable fabric support.

Figure 1, represents a side elevation of. the improved machine parts of the same be-l ing broken away and other parts being shown in section as on line 1-,1 Fig. 2. v,

lFig.'2, represents a plan viewA partly in section as on line 2-2 Fig. 1.

l Fig. 3, represents an enlarged detail view in side elevations of parts of the machine, portions of the same being shown in sec.- tion asl `on line 3--3 Fig.- 4.

Fig. 4, represents a plan view ofsome of the parte shown in Flg. 3.

Fig. 5, represents a detail vlewpartly 1n section on line 5-5 Fig. 1 'to more clearly illustrate the means for lifting members of the work holder.

Specication of Letters Patent.

llwatentedllfay 6, 1919..

Application med. May 21, 1917. Serial No, 169,936.A

Similar characters of reference designate corresponding parts throughout.

vThe subject matter of the present invention is shown in the drawin in relation toa wellnknown single threa sewing machine having the base 6, the bed plate? and the head 8. `Base 6 has the usual rotary looper shaft 9 furnished with the looper 10 and said looper shaft 9 has also the worm 11 which drives the worm gear 12 of cam member 13 havin the cam groove 14 and rotatably carried y the stud 15 depending from bed plate 7 or said-cam member 13 may be mounted in any other well known manner.A VW'orm gear 12 has the cam 16 which is adapted at a point inthe rotation of said cam to ride under and l-ift the rod 17 which is slidably mounted or this rod 17 may be actuated in any manner now known.-

Head 8 is furnished with arm 18 having at its forward end the usual member 19 having a guide for the needle bar 2O carrying the needle 21 and adapted to be operated in the usual manner by well known mechanism which, in its specific construction, does not form part of the present invention. On

arm 18 are mounted the thread tensions 22, 22' and the posts 23, 24 of which post 23 has the pivoted arm 25 which is adapted to be operated by the upward movement of restraining or thread clampingmeans for the. sewing thread af-w which 'passes through said tensions "22, `22and between lever arms 30and 31 all of whichv and particularly the lever arms 30 and 31 `are adapted to be adjusted on said shaft 26 relative tothe swing of their free ends. Arms 30 and :31 preferably diifer in length as shown in Fig. 1 in order that,'in the swing of these armscaused by rotative movement of shaft'` 26, they 4mayy exertdiferent leverage actions on their yrespective chains 32- and 33.4

7' Bed plate 7 has the bearing 34 which is journaled the shaft 35 hav1ng at' its lower portion the arm- 36 havmg the follower f. 37 which'is engaged with and follows the. cam

S5 rod 17 to coperate with .post 24 as a thread groove 14 tof cam member 13 in the rotation of such member. At the upper portion ofl shaft 35 is arm 38 provided with the adjustable lever member 39 which operates the shaft 40 to effect theswinging of its l lever arm 41 through Iwhich vibratory motion is imparted to the base 42 of the work holder. Such vibratorymotion of base 42 is substantially longitudinal of said base and, in one direction, is cushioned and resisted by the coil spring 44 located between the head 8 and the member 43 of said base 142. Spring 45 connected with said base 42 and with a fixed part ofthe machine tends to draw said base 42 out of its right line movement and such drawing action of 'spring 45 is controlled ,by the connecting rod 46 pivotally connected with said base `42-and with the clamp member 47 which is l through a slot in the wall of said guide 49 and has the elamping'member 52. At its Aforward .portion cloth plate 50 has the neevdle passage 53 and the depending guide 54, which j latter is free to move in the slot 7 of bedplate 7- (see Fig. 3), and in this guide 544 isvertically adjustable the member` 55 of the cloth support 56 having the slot or needle passage 57. After adjustment said member 55 is secured by means of its clamp device 58 which has a shank or screw free 4- toA move in a slot 'of said guide 54.

' adjustment is vthe button engaging jaw 71.

Pivotally connected with member 43 of the work carrier base 42is the arm 59 which has at its forward end the plate 60havi'ng the slot 61 and carrying the curved presser foot member 62 .adapted to bear against fabric under operation, as shown in Fig. 3, and shaped as a jaw to receive the `lower edge portion 0f a shank button under operation. Plate 60 has also the upstanding posts 63 and 64 of which post 63 has the laterally extending.4 member 65 connected with chain 32 and post 64 has the block member 66 lidably adjustable on said post 64 and havmg the stop 67 and the set screw 68 by means 0f which said member 66 may be secured in the adjusted position on said post 64. Pivotally mounted on 'said member 66 1S the plate 69 which is connected with chain '33 and is furnished with the arm 70 having Provision is made bymeans ofy spring 72 carried by member. 66 to press downward plate 69 and its button engaging jaw 71.

.he manner of mounting post 64 on plate 60 issuch that said post 64v may be adjusted 'along the slot 61 .of said plate 60. Such effected by means of the post 73 mounted on memberx 74 and extending vthe work and the stitch through opening 75 in the plate 69. Member 74 is pivotally mounted on plate 60 and `has the arm 76 and the curved slot 77 through which slot extends the stud 78, of plate 6 0, having the` clamping nut 79. The. purpose of such adjustment is to adjust the button engaging-jaw 71 relative to the jaw 62 whereby the head of button B can be `adjusted relative to its generally vertical AfabricvF, the machine is ready to receive the work. In order to facilitate the placing of the button B in position lever 27 is operated to eiiect the partial rotation 0f shaft 26 whereby levers 30 and 31 are caused to swing. ,Lever 30 being longer than level 31 acts on its chain 32 to lift plate 60, through the swinging of armA 59, and the mechanism carried by said plate 60, including its jaw member 62. After said plate 60 and its jaw member 62 has been moved a predetermined distance lever 31 acts through its chain 33, connected with plate 69, to lift said plate 69 and 'its button engaging jaw 71 whereby said jaw members 62 and 71 are spaced apart to receive the button B in the position shown in the drawings. While the button holding jaw 62 is in the elevated position fabric F gis placed in position as shown in Fig. 3 extending over the cloth support 56 and beneath the button holding jaw 62 which, by reactive movement of lever 30 is permitted to rest as a presser foot on the fabric F to hold said fabric against cloth plate 50 while the button shank S preferably bears against the fabric sustained by the cloth support 56.

The machine is now operated to effect a predetermined number of stitch forming actions du'ring which the work carrier comprising the plate 42 and the mechanism mounted thereon is caused to vibrate through the operation of cam groove 14 on `follower 37 of arm 36 so that a series of stitches is sewn across the wire or member of shank S. This cam groove is so shapedthat'during the sewing of theinal stitch or stitches of said group the relative movement between forming devices ceases whereby, as is well known, one or more f'chaln stitches is formed which latter by the tlghtening of the thread a may be drawn into a knot. so called, close to the under slde of the fabric F, from which knot the thread will extend down to and around the looper 10 then upwardly through the Lacasse la needle 21` and various guides and between the parts 24C and 25 of the thread clamp andthrough the tensions 22, 22.

At or about the completion of the stitch forming operation or of the thread knotting operation just above referred to rod 17 is raised by the riding thereunderjof cam 16 of gear 12 or in any other suitable and well known manner with the result that the thread a is clamped or restrained between the members 24Cl and 25 so that the thread cannot freely pass toward the needle.

After such sewing operation partial' rotation of shaft 26 is again eli'ected whereby thread puller-s 28 and 29 are caused to act upon thread a in a manner now known in the art, puller 28 to draw a supply of thread a through tensions 22, 22 and puller 29 to take up slack thread betwen the thread clamp 24C, 25 and the work. Such rotative movement of shaft 26 also eilects swinging of lever 30 which, through chain 32, raises the plate 60 and its jaws 62 with the work and effects the breaking oi the thread which is followed by the lifting action of lever 31 whereby, vthrough chain 33,'plate 69 and its jaw 71 are given a movement relative to jaw 62 to free the butto-n B whereupon said button attached to the fabric may be readily removed.

Having thus described my invention I claim as new and desire to secure by Letters Patent.

1. A sewing Amachine comprising a Work holder having a cloth plate and a pair of button holding jaws spaced vertically above said cloth plate-and movable, relative to each other and to said cloth plate, one 'of said jaws adapted to bear on cloth on said plate, and a cloth support carried by said cloth plate, said cloth support and cloth plate cooperating to eect `adjustment of cloth relative to the path of the needle and vertically.

2. A sewing machine comprising a work holder having a cloth plate, an arm pivotally mounted in said holder 'and having a button holding jaw constituting a presser foot, a second jaw spaced above said first jaw and pivoted means for carrying said 66 second jaw, said pivoted means mounted on said arm for adjustment.

3. A sewing machine. comprising a work holder having a shil'table cloth plate, a vertically adjustable cloth sustaining member 55 mounted on said plate, a presser carrying member above said cloth plate having'a button engaging presser foot, a post adjustably mounted on said presser carrying member, a

second button engaging member yieldingly te mounted on saidvpost, and mechanism for elevating said presser carrying member and said secondbutton engaging member to separate said button engaging members.

A. A sewing machine comprising a work t5 holder having a shift-able cloth plate, a vertically adjustable Cloth sustaining member mounted on said plate, a presser carrying member above said cloth plate having a button engaging presser Jfoot, a post adjustably 7U mounted on said presser carrying member, a member vertically adjustable on sa'id post and. having a stop, a spring pressed plate pivoted on said latter member and sustained by said stop, a second button engaging member We mounted on said post, means to raise said presser carrying member, and means to raise said plate independently of said presser carrying member.

5. A sewing machine comprising a work 80 holder having a shiftable cloth plate, a vertically adjustable cloth sustaining member mounted on said plate, a presser carrying member above said cloth plate having a lbutton engaging presser foot, a post mounted 85 to slide transversely in a slot of said presser carrying member, means to adjust said post, a hinge member vertically adjustable on lsaid post and having a stop and a spring, a plate hinged to said hinge member and acted upon 9 O Janne n. Masrnnsou., 

